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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13935) Orphaned namespace table ZK node should not prevent master to start
Date Thu, 18 Jun 2015 21:00:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14592497#comment-14592497

Hadoop QA commented on HBASE-13935:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against branch-1.0 branch at commit 8ae4b374e3fa4cd54b8b83bc857d41f0678ad9b6.
  ATTACHMENT ID: 12740465

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 new or modified

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.1 2.5.2 2.6.0)

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 protoc{color}.  The applied patch does not increase the total number of
protoc compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn post-site goal succeeds with this patch.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/14464//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/14464//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/14464//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/14464//console

This message is automatically generated.

> Orphaned namespace table ZK node should not prevent master to start
> -------------------------------------------------------------------
>                 Key: HBASE-13935
>                 URL: https://issues.apache.org/jira/browse/HBASE-13935
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 1.0.0, 0.98.13
>            Reporter: Stephen Yuan Jiang
>            Assignee: Stephen Yuan Jiang
>             Fix For: 0.98.14, 1.0.2
>         Attachments: HBASE-13935.v1-0.98.patch, HBASE-13935.v1-branch-1.0.patch
> Before we have the state-of-art Procedure V2 feature (HBASE 1.0 release or older), we
frequently see the following issue (orphaned ZK node) that prevent master to start (at least
in testing):
> {noformat}
> 2015-06-16 17:54:36,472 FATAL [master:] master.HMaster: Unhandled exception.
Starting shutdown.
> org.apache.hadoop.hbase.TableExistsException: hbase:namespace
> 	at org.apache.hadoop.hbase.master.handler.CreateTableHandler.prepare(CreateTableHandler.java:137)
> 	at org.apache.hadoop.hbase.master.TableNamespaceManager.createNamespaceTable(TableNamespaceManager.java:232)
> 	at org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:86)
> 	at org.apache.hadoop.hbase.master.HMaster.initNamespace(HMaster.java:1123)
> 	at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:947)
> 	at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:618)
> 	at java.lang.Thread.run(Thread.java:745)
> 2015-06-16 17:54:36,472 INFO  [master:] master.HMaster: Aborting
> {noformat}
> The above call trace is from a 0.98.x test run.  We saw similar issue in 1.0.x run, too.
> The proposed fix is to ignore the zk node and force namespace table creation to be complete
so that master can start successfully.  

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